Domestic postage for a standard letter is now .57 each, .60 with tax.
These stamps do not have the rate on them, and never expire. This change was done as of Jan 11, 2010. See Canada Post's website for further details.
The stamp has to be accepted where you mail the letter. If you are mailing in Canada, you need a Canadian stamp. If you are in the US mailing to Canada, you can use a US stamp.
Canada
You use the postage of the country of origin, in this case, you would use Canadian postage.
A Canada two-penny black is an old, Canadian postage stamp.
4 cents
what is the cost of a first class satamp from us to canada
0.57 cents in 2011
Canadian stamps are only used in Canada. When mailing a letter, you use the stamps of the country of origin. So only Canadian stamps can be used there.
32 cents
50,000 canadian euros
Cost of living in canadian provinces
What is the cost of a letter to be mailed from US to Canada